Implement food creation, such as it is

src/lib/database/food.ts

@@ -1,18 +1,44 @@
 import { db } from '$lib/database'
+import type { Err } from '$lib/types'
 
 export type Food = {
-	rowid: number,
+	rowid?: number,
+	date?: Date,
 	food: string,
+	description?: string,
 	amount: number,
-	per100: number,
-	energy: number,
+	per100?: number,
+	energy?: number,
 }
 
+const columns = ['rowid', 'date', 'food', 'description', 'amount', 'per100', 'energy']
+
 const FoodService = {
 	async GetAll() {
-		return await db.select<Food[]>('SELECT rowid, food, amount, per100, energy FROM food ORDER BY date DESC')
+		return await db.select<Food[]>(`
+select ${columns.join(', ')}
+from food
+order by date desc
+		`)
 	},
-	async SetAll(data: Food[]) {
+	async GetAllForDate(date: Date) {
+		return await db.select<Food[]>(`
+select ${columns.join(', ')}
+from food
+where strftime('%Y-%m-%d', date) = strftime('%Y-%m-%d', '2024-06-12')
+or strftime('%Y-%m-%d', date) = strftime('%Y-%m-%d', date('2024-06-12', '-1 day'))
+order by date DESC;
+`, [date])
+	},
+	// TODO: Rework this to use Err in Go style
+	async Create(food: Food): Promise<[Food, Err]> {
+		if (!food.food) return [food, 'food.food is required']
+		if (!food.amount) throw [food, 'food.amount is required']
+
+		const res = await db.execute(`insert into food (food, description, amount) values ($1, $2, $3)`, [food.food, food.description, food.amount])
+		const row = await db.select<Food>(`select ${columns.join(', ')} from food where rowid = $1`, [res.lastInsertId])
+
+		return [row, null]
 	}
 }